Bluish-slate Antshrike

The bluish-slate antshrike is 13.5 to 14.5 cm (5.3 to 5.7 in) long and weighs 16 to 18 g (0.56 to 0.63 oz). Adult males of the nominate subspecies are almost entirely darkish gray; they have a hidden white patch between the scapulars. Adult females' upperparts and throat are a slightly browner and paler gray than the male's. Their ear coverts and throat have thin white streaks. Their belly and flanks are deep cinnamon-rufous. Subspecies T. s. intermedius is darker overall than the nominate. Voice: The bluish-slate antshrike's song is a "hurried series of a few very high, fluted notes, then accelerating to a rather long, downslurred rattle". Its calls include "a rattle, usually introduced by...a whine", "similar notes given in succession", a "downslurred note", and "a soft chatter".